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31. The cell membrane is made up of
A. lipoproteins
B. cellulose
C. phospholipids
D. phosphoproteins
32. Which of the following statements about the outer mitochondrial membrane is not true?
A. The outer membrane is impermeable to hydrogen ions
B. The outer membrane is highly permeable to substances of small molecular weight
C. The outer membrane is about 50% lipid and 50% protein by weight
D. The outer membrane contains porins
33. Specialized type of peroxisome and the site of the glyoxylate pathway in certain plants is known as
A. gly-peroxisome
B. lysosome
C. glyoxysome
D. none of these
34. Which of the following observations is not used as evidence to support the concept of endosymbiotic origin of chloroplasts and mitochondria?
A. Both have their own DNA
B. Both have their own ribosomes
C. Both strongly resemble prokaryotes, especially in size
D. Both can live and function independently of the cell
35. The fluid matrix of a cell is called the
A. nucleus
B. cytosol
C. cytoskeleton
D. endoplasmic reticulum
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